As much fun as I'm having with this game, the performance is starting to become intolerable. Dipping down to 20 fps with 25% GPU usage? C'mon.
Same, with 3-4 people I had to turn nearly all the settings down and it was still going to 20-30 fps. Supposedly the patch improved particle performance, but I suspect it's CPU-related -- I'm guessing it also only uses one core.
I leveled an engineer from 1-15 with a group of 4-6 people tonight. Multiplayer gets almost too crazy over 4 though, since it becomes nearly impossible to see what's going on. I like using the engineer cannon blast ability from a distance...in fact everyone until near the end rolled new characters, and I may have been the only one (or one of two) who never died, thanks to being so tanky. Even running in and spamming the stomp stun ability you're usually pretty safe it seems, with healbot and shield.
One downside of engineer, or maybe how I'm using it, is I hardly ever seem to build charge with autoattack, so I'm just not focusing on abilities that depend on charge to do damage.